<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>加法</h1>
<!-- 默认情况下， form 表单发出时 GET 请求， 如果要发POST请求必须添加method属性 -->
<form action="add.s" method="post">
	a : <input name="a" type="number"><br>
	b : <input name="b" type="number"><br>
	<button>求和</button>
</form>

<h1>a的b次方</h1>
<form action="add.s" method="post">
	a : <input name="a" type="number"><br>
	b : <input name="b" type="number"><br>
	<button>求和</button>
</form>

</body>
</html>